import QtQuick 2.0

Rectangle {
    id: root
    width: 320; height: 240
    color: "lightgray"
    signal sendClicked(string str)  //定义信号
    Text {
        id: txt
        text: "Clicked me"
        font.pixelSize: 20
        anchors.centerIn: parent
    }
    MouseArea {
        id: mouse_area
        anchors.fill: parent    //有效区域
        onClicked: {
            root.sendClicked("Hello, Python3")  //发射信号到Python
        }
    }
}